I have the same problem, but it happens with my casio fx-115 es caculator... when i use the texas insturments caculator at school my answer is correct..
Hello,
It may be due to the angle unit used. You can have angles in
degrees, in radians, and in grads. You should set the default angle
unit to waht you problem calls for.
To set degree as default SHIFT MODE 3
To set radians as default SHIFT MODE 4
To set grads as default SHIFT MODE 5
The
values of angles calculated by the inverse trigonometric functions are
in the default unit that is set . This may be the source of the wrong
answers that you get.
Hope it helps.
Testimonial: "thanks alot!! "
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